In two decks of cards, what is the least amount of cards you must take to be *guaranteed* at least one four-of-a-kind?

Cristina was born in 1888. She just had her 30th birthday today how did that happen?

You are stuck on an island where you have nothing. You find four pieces of paper somewhere on the island. What will be your strategy to escape from the island safely?

PS: No other resource is available to you on the island, neither can you build anything.

A number can be multiplied by multiple of nine
i.e 9 18 27 36 45 ...

and the resulting number consist of only one digit.

Can you identify the number ?

Imagine you are in a room with no windows or doors. How will you get out?

Can you write down eight eights so that they add up to one thousand?

I have branches, but no fruit, trunk or leaves. What am I?

Considering the below equation:

V + II - VI = 10
IV - X + VIII = 20
IV - VII + VI = 30

Then, I + II + III = ?

Can you decipher the below rebus?

PBLUESAISNUERSES

Who always enjoys poor health?